I am 57, 5'2", and just picked up my 2008 29' Jayco Melbourne today. I've broken myself in with a 19' Tioga Montara, followed by a 23' Tioga, but have to admit that the extra length has been quite intimidating, so far. This is definitely a HUGE upgrade ... just hope I can operate it safely, and remember which switch does what!
Welcome to the forum! That is a nice upgrade. Just take it slow and easy and you should be just fine. Like I always say - the vacation begins when I leave the driveway. I take it easy on the roads and enjoy the drive.